Ore-crusher



P. 0. DUBOIS. Ore-Crusher.

2 Sheets-Sheet 1.

Patented Jan. 6, 1880.

Fig.2

Witnesses wW W a 2 Sheets-Sheet 2.

P. C.'DUBOIS. Ore-Crusher.

Patented Jan. 6,1880.

Fig 3 Fig" 5 Fig 4 ,"mrenimr Q 3 CO. 0 E H a W UNITED STATES PATENT()FFICE.

PIERRE O. DU BOIS, OF COPPER CITY, CALIFORNIA.

ORE-CRUSH ER.

SPECIFICATION forming part of Letters Patent No. 223,281, dated January6, 1880. Application filed March 15, 1879.

To all whom it may concern Be it known that I, PIERRE O. DU BOIS, ofCopper City, county of Shasta, and State of California, have invented aPnlverizingRock Breaker; and I hereby declare the following to be afull, clear, and exact description there of, reference being had to theaccompanying drawii'igs.

My invention relates to certain improvements in that class of crushingapparatus in which the rock is broken by means of twojaws placedopposite to each other, one of which jaws is made to alternatelyapproach to and recede from the other stationary jaw.

My invention consists in thenovel combination of a breaking, grinding,and sizing mechanism, in which the rock, ore, orother material is brokenand pulverized to any degree offineness. This is eti'ected by a peculiararrangement and operation of a movable jaw with relation to anoppositely-placed stationary jaw, and in certain mechanism by which thisjaw is operated, as will be more fully described by referring to theaccompanying drawings, in which Figure l is a longitudinal section of myapparatus. Fig.2 is a horizontal section. Figs. 3 and 4 show amodification. Fig. 5 is a view of the face of a die or jaw.

A is the frame of my machine, which is made strong enough to resist thestrain upon the jaws. H is the stationary jaw, and G is the movable jaw.This jaw G has a peculiar to-and-fro and up-and-down motion given to it,by which a double action takes place upon the material which isintroduced. The jaws are preferably made plain, as experience provesthat such jaws will take better hold of the ore than roughened surfaces,and they are placed with their upper edges sufficiently separated toreceive the material to be fed to the machine. The lower edges approacheach other, and are, so curved as to present a portion of their faces,which are nearly or quite parallel in their position, so that thepeculiar movement of the machine will give a powerful grinding action.These jaws are adjustable, as will be hereinafter described, so as tostand at any desired distance apart, and as this distance will be fixedby the adjustment so as to be permanent, it will be seen that any degreeof fineness may be given to the material, and I thus combine the breakerand pulverizer, while no screens will be necessary, as the ore cannotescape until it has arrived at the desired degree of fineness.

In the construction of the jaws wrought-iron or steel dies may beintroduced into the lower or pulverizing portion, if desirable, and thefaces of these dies may be grooved, as shown in Fig. 4,. to increase thegrinding-power; but I have found that very satisfactory results comefrom the use of plain faces.

The movement given to the movable jaw is one which causes its upper partto approach the stationary jaw and break anything which may lie betweenthe two. At the same time the lower part of the jaw is drawn downwardwith a rubbing motion, which is extremely effectiveto pulverize the ore,and it is held at a certain distance from the fixed jaw, so that whenthe dust escapes it will be reduced to a certain fineness.

B B are the arms of knee-levers, which are united at the center. Onepair of these knees on each side have their outer ends hinged or jointedto stout lugs upon the upper end of the movable jaw G, and the oppositeends of the other levers are jointed to the upper part of the frame.Short pinnen D unite the meetingpoints of these lovers with theeccentric-straps upon the eccentrics J. These eccentrics are mountedupon the main driving'shaft I, and when rotated their action upon theknee-levers will be to open and close the upper parts of the jaws.

G U are another pair of knee-levers, standin g between the two pairs BB. One of these levers has its outer end jointed to the lower part ofthe movable jaw G at M, while the other lever has its outer end jointedto the upper part of the frame at M, so that the general direction ofthe levers is nearly vertical. The meeting-joint of these levers isconnected with another eccentric, J also formed upon the shaft I, anddriven byit. The action of these levers will be to give the jaw G asliding motion up and down upon the stationary jaw, the grinding orpulverizing efiect taking place at the lower or meeting ends of thejaws, as before described.

The eccentrics J and J are so set upon the 2 aeaasn shaft with referenceto each other that they produce by their action upon the two sets ofkneelevers a peculiar drawing and rolling motion of the surfaces at thelower end of the jaws, while the movement at the upper end is priircipally one of opening and closing.

In order to adjust the space between the grinding or pulverizin portionof the jaws, I employ a beam, F, which has its ends rounded or otherwisefitted so that one end will press against the back of the jaw G at thebottom, while the opposite end rests against a sliding arm, K. This armextends backwardthrough a slot in the frame, as shown, and anadjusting-wedge, L, behind it serves to move it and the beam F forwardor back, so as to set the lower or pulverizing part of the jaw G at thedesired distance from the stationary jaw.

It will be seen by this description that my apparatus is complete as abreaker and pulverizer, and its action is to receive the rock and firstbreak and reduce it, and then to commi nute and pulverize it to anydegree of fineness, the space between the lower part ot the jaws beingsuch as to only discharge the ore when it has reached the desiredfineness, so that I entirely dispense with the subsequent use of ascreen, and the machine is complete and perfeet in itself. I

It may be found, in practice, that the grinding or pulverizing movementmust be more rapid than the breaking or crushing motion, in order topnlverize the ore as fast as it is ready; and in order to produce this Ihave shown a modification in Fig. 3, where the lever 0 is connected withthe jaw G and extends up to a short crank or eccentric, 0, mounted upona shaft, P. A. pinion, Q, upon this shaft is driven by a largegear-wheel, R, upon the main shaft, the purpose being to obtain a rapidup-and-dmvn motion of the jaw with a comparatively slower to-and-fromotion of the upper part.

It will be seen that while the whole of the jaw G is really subjected tothe action of both sets of levers, the attachment of one set at the topand the other at the bottom of the jaw has the effect to give the lowerpart of the jaw a simple grinding motion, which is very nearly vertical,and it is rendered practically so by the shape of the jaws at thispoint, which are so curved that their whole movement is parallel. Theupper part of the jaw is subjected to the up-and-down motion, and, inaddition, to the to-and-fro motion, which makes a compound action atthis point, tending to break and carry the ore downward.

.I do not claim multiple'cams and rods in combination with an undividedjaw of a stone breaker or crusher, for such is not my invention.

1 am also aware that a to-and-fro motion has been given to one or bothof a pair of crushing-jaws; and I am also aware that a stone or rockbreaker having irregular surfaces has been constructed with an eccentricwhich would give the movable jaw an irregular or rotary motion. I donot, therefore, clann these movements, broadly; but

What I do claim, and desire to secure by Letters Patent, is

1. The converging jaws H G, with the horizontally-acting knee-levers BB, pitman D, and eccentric J, and the vertically-acting levers O O, withtheir actuating-eccentric J, whereby a vertical grinding movement isgiven to the lower ends of the jaws and a vertical and to-and-fromovement is given to the upper part of the jaws,substantially as and forthe purpose herein described.

2. The convergingjaws G H, with their independently-act uating levers BB U G, in com bination with the beam F, sliding arm K, and adjnsting'wedge L, whereby an adjustable sizing device is produced,substantially as herein described.

3. The convergmgjaws H and G, with their i'nde imndently-actua-tinglevers B, B, and U, the lever 6 being driven by the eccentric O, pinionQ, and gear-wheel 1t, substantially as and for the purpose hereindescribed.

In witness whereof I have hereunto set my hand.

PIERRE O. DU BOIS.

Viitncsses:

FRANK A. BROOKS, OHAs. G. YALE.

